Electromechanical Study of Carbon Fiber Composites

1997 ◽  
Vol 500 ◽  
Author(s):  
Xiaojun Wang ◽  
Xuli Fu ◽  
D.D.L. Chung
Keyword(s):  
Residual Stress ◽  
Carbon Fiber ◽  
Fiber Composites ◽  
Single Fiber ◽  
Fiber Direction ◽  
Carbon Fiber Composites ◽  
Fiber Waviness ◽  
Pull Out ◽  
The Matrix ◽  
Fiber Matrix

ABSTRACTElectromechanical testing involving simultaneous electrical and mechanical measurements under load was used to study the fiber-matrix interface, fiber residual stress and marcelling (fiber waviness) in carbon fiber composites. The interface study involved single fiber pull-out while the fiber-matrix contact resistivity was measured. The residual stress study involved measuring the resistance of a single fiber embedded in the matrix while the fiber was tensioned at its exposed ends. The marcelling study involved measuring the resistance of a composite in the through-thickness direction while tension was applied in the fiber direction.

Electromechanical study of carbon fiber composites

1998 ◽  
Vol 13 (11) ◽  
pp. 3081-3092 ◽  
Author(s):  
Xiaojun Wang ◽  
Xuli Fu ◽  
D. D. L. Chung
Keyword(s):  
Carbon Fiber ◽  
Electrical Resistance ◽  
Fiber Composites ◽  
Single Fiber ◽  
Fiber Direction ◽  
Carbon Fiber Composites ◽  
Fiber Waviness ◽  
Pull Out ◽  
The Matrix ◽  
Fiber Matrix

Electromechanical testing involving simultaneous electrical and mechanical measurements under load was used to study the fiber-matrix interface, the fiber residual compressive stress, and the degree of marcelling (fiber waviness) in carbon fiber composites. The interface study involved single fiber pull-out testing while the fiber-matrix contact electrical resistivity was measured. The residual stress study involved measuring the electrical resistance of a single fiber embedded in the matrix while the fiber was subjected to tension through its exposed ends. The marcelling study involved measuring the electrical resistance of a composite in the through-thickness direction while tension within the elastic regime was applied in the fiber direction.

scholarly journals Scanning Electron Microscope Configuration of Recycled Carbon Fiber Composites: Mini Review

2019 ◽  
Author(s):  
Seyed Hossein Mamanpush ◽  
Azadeh Tavousi Tabatabaei
Keyword(s):  
Electron Microscope ◽  
Carbon Fiber ◽  
Scanning Electron Microscope ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Pull Out ◽  
Heat Treated ◽  
Significant Difference ◽  
Carbon Fiber Epoxy ◽  
Scanning Electron

Carbon fiber composites (CFCs) were mechanically refined and classified the scanning electron microscope (SEM) configuration of untreated and heat-treated mechanically recycled carbon fiber epoxy and carbon fiber vinyl ester composite were examined by using scanning electron microscopy (SEM). SEM Results indicate that the main defects in the structure of recycled CFCs are broken fibers, fiber pull-out, fiber-matrix separation. Also Comparing SEM of untreated and heat-treated recycled CFC indicates that there is no significant difference between their micrographs.

Effect of High Temperature on Fiber/Matrix Interfacial Properties for Carbon Fiber/Polyphenylenesulfide Model Composites

2014 ◽  
Vol 627 ◽  
pp. 173-176 ◽  
Author(s):  
Kazuto Tanaka ◽  
Jun Nishio ◽  
Tsutao Katayama ◽  
Shinichi Enoki
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Carbon Fiber ◽  
Interfacial Properties ◽  
Pull Out ◽  
Actual Operating ◽  
The Matrix ◽  
Fiber Matrix ◽  
Reinforced Thermoplastics ◽  
Fiber Reinforced Thermoplastics

To use Carbon Fiber Reinforced Thermoplastics (CFRTP) for automobile applications, mechanical properties of CFRTP under actual operating temperatures are needed to be clarified. When focusing on heat resistance of CFRTP, to use Polyphenylenesulfide (PPS) for the matrix is desirable. However, the effect of high temperature on mechanical properties of CFRTP using PPS has not been clarified yet. In this study, single fiber pull-out tests of CF/PPS model composites under high temperature were conducted to reveal the fiber/matrix interfacial properties.

Cure Monitoring and Stress-Strain Sensing of Single-Carbon Fiber Composites by the Measurement of Electrical Resistance

2005 ◽  
Vol 297-300 ◽  
pp. 676-684 ◽  
Author(s):  
Sang Il Lee ◽  
Dong Jin Yoon ◽  
Seung Seok Lee ◽  
Joung Man Park
Keyword(s):  
Residual Stress ◽  
Carbon Fiber ◽  
Electrical Resistance ◽  
Fiber Composites ◽  
Curing Temperature ◽  
Fiber Axis ◽  
Carbon Fiber Composites ◽  
Strain Sensing ◽  
Stress Strain ◽  
Cure Monitoring

Cure monitoring and stress-strain sensing of single-carbon fiber composites were nondestructively evaluated by the measurement of electrical resistance. The difference of electrical resistance before and after curing increased highest when gauge length of the specimen was the smallest. As curing temperature increased, the electrical behavior of steel fiber was different from that of semi-conductive carbon and SiC fibers. Residual stress built in the fiber was the highest at the fiber axis direction. Whereas residual stress built in the matrix was relatively high at the fiber circumference and radius directions. Residual stress calculated from the experiment was consistent with the results from the finite element analysis (FEA). The strain at low curing temperature was larger than that of higher temperature until the load reached maximum value. The apparent modulus of the electrodeposited composites was higher than that of the untreated composites due to the improved interfacial shear strength (IFSS). The electrical resistance was responded quantitatively with stress-strain behavior during the test. Electrical resistance measurement can be feasible nondestructive techniques to evaluate cure monitoring and stress-strain sensing in the conductive fiber composites.

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